F01M 13/028
Of positive pressure
Official title: {of positive pressure}
F01M13/028 (Of positive pressure) appears on 88 US grants and 92 published applications in this corpus.
Search patents in F01M- Granted patents
- 88
- Published applications
- 92
- Assignees
- 46
- Inventors
- 221
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 1 | 2 |
| 2008 | 1 | 4 |
| 2009 | 2 | 2 |
| 2010 | 0 | 9 |
| 2011 | 1 | 2 |
| 2012 | 2 | 2 |
| 2013 | 6 | 2 |
| 2014 | 4 | 8 |
| 2015 | 5 | 8 |
| 2016 | 6 | 8 |
| 2017 | 6 | 5 |
| 2018 | 7 | 4 |
| 2019 | 1 | 0 |
| 2020 | 7 | 10 |
| 2021 | 9 | 1 |
| 2022 | 5 | 3 |
| 2023 | 3 | 4 |
| 2024 | 5 | 3 |
| 2025 | 6 | 6 |
| 2026 | 1 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Engine7 Jul 2026US 12,674,405 B2Toyota Jidosha Kabushiki Kaisha
- Blow-by gas recirculation device9 Dec 2025US 12,492,652 B2Toyota Jidosha Kabushiki Kaisha
- Crankcase ventilation systems including integrated sensors and controller4 Nov 2025US 12,460,564 B2Cummins Filtration Inc.
- Controller for internal combustion engine4 Nov 2025US 12,460,590 B2Toyota Jidosha Kabushiki Kaisha
- Blow-by gas recirculation device2 Sep 2025US 12,404,825 B2Toyota Jidosha Kabushiki Kaisha
- Internal combustion engine3 Sep 2026US 2026/0258740 A1Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- System and control method13 Aug 2026US 2026/0235056 A1Komatsu Ltd.
- System and control method6 Aug 2026US 2026/0226853 A1Komatsu Ltd.
- Air system and method for engine utilizing electric-assist compressor for purging gases2 Jul 2026US 2026/0185470 A1Caterpillar Inc.
- Internal combustion engine and method for operating an internal combustion engine18 Jun 2026US 2026/0168416 A1
Most cited
By later US patents
- Closed crankcase ventilation system38US 5,669,366 AFleetguard, Inc. · 1997
- Anti-pollution device31US 4,011,846 ADid-Mor Engineering and Manufacturing Co. · 1977
- Engine crankcase vacuum check valve system for internal combustion engines31US 4,760,833 A1988
- Four-stroke-cycle engine17US 5,582,145 AIshikawajima-Shibaura Machinery Co., Ltd. · 1996
- Automotive fuel saving system15US 4,404,950 A1983